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Cathode leakage detection method and device for fuel cell system

A fuel cell system and leak detection technology, which is applied in the computer field, can solve the problems of system efficiency impact, car flameout, and inability to detect leaks, and achieve the effect of improving the efficiency of cathode leak detection.

Active Publication Date: 2021-11-23
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current gas leak detection is mostly focused on the hydrogen leak detection on the anode side, and less on the air leak detection on the cathode side, and the leak detection must be performed when the fuel cell system is in a stopped state, and it is impossible to realize the start-up of the system. Simultaneous leak detection
However, the technology of stopping the operation of the fuel cell system for leak detection during the operation of the fuel cell system will have some disadvantages. For example, multiple interruptions of operation will easily cause the car to stall, and multiple interruptions of operation will also have a certain degree of impact on the efficiency of the system. Wait

Method used

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  • Cathode leakage detection method and device for fuel cell system
  • Cathode leakage detection method and device for fuel cell system
  • Cathode leakage detection method and device for fuel cell system

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Experimental program
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Embodiment 1

[0029] see figure 1 , figure 1 It is a schematic flowchart of a cathode leakage detection method for a fuel cell system disclosed in an embodiment of the present invention. in, figure 1 The described cathode leakage detection method for a fuel cell system can be applied to a controller of the fuel cell system. Such as figure 1 As shown, the cathode leakage detection method of the fuel cell system may include the following operations:

[0030] 101. Open the bypass valve, and close the shut-off valve and the back pressure valve when receiving a starting instruction for starting the fuel cell system.

[0031] In the above step 101, the starting command of the fuel cell system may be issued by the vehicle controller of the fuel cell vehicle, wherein the vehicle controller is used for overall control of the fuel cell vehicle. After the controller of the fuel cell system receives the startup command issued by the vehicle controller, the controller of the fuel cell system will c...

Embodiment 2

[0038] see figure 2 , figure 2 It is a schematic flowchart of another cathode leakage detection method for a fuel cell system disclosed in an embodiment of the present invention. in, figure 2 The described cathode leakage detection method for a fuel cell system can be applied to a controller of the fuel cell system. Such as figure 2As shown, the cathode leakage detection method of the fuel cell system may include the following operations:

[0039] 201. Open the bypass valve, and close the cut-off valve and the back pressure valve when receiving a starting instruction for starting the fuel cell system.

[0040] For the specific definition of step 201, reference may be made to the specific definition of step 101, which will not be repeated here.

[0041] 202. After opening the bypass valve and closing the cut-off valve and the back pressure valve, respectively detect the corresponding opening values ​​of the bypass valve, the stop valve and the back pressure valve.

[...

Embodiment 3

[0078] see image 3 , image 3 It is a schematic structural diagram of a cathode leakage detection device for a fuel cell system disclosed in an embodiment of the present invention. in, image 3 The described arrangement can be applied in a controller of a fuel cell system. Such as image 3 As shown, the cathode leakage detection device of the fuel cell system may include:

[0079] The switch module 301 is configured to open the bypass valve, and close the cut-off valve and the back pressure valve when receiving a starting instruction for starting the fuel cell system.

[0080] Further, after the switch module 301 opens the bypass valve and closes the stop valve and the back pressure valve, the start module 302 can be triggered to start.

[0081] The starting module 302 is used to start the air compressor.

[0082] Further, after the starting module 302 starts the air compressor, the first judging module 303 may be triggered to start.

[0083] The first judging module 3...

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PUM

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Abstract

The invention discloses a cathode leakage detection method and device for a fuel cell system. The method comprises the steps of opening a bypass valve when a starting instruction for starting the fuel cell system is received, and closing a stop valve and a back pressure valve; starting an air compressor; and when the real-time working parameters of the air compressor reach the preset target working parameters within the preset duration, judging whether leakage exists in the cathode of the fuel cell system or not according to the pressure difference value between an outlet of the air compressor and an outlet of a humidifier. By implementing the cathode leakage detection method of the fuel cell system provided by the invention, online leakage detection on the cathode of the fuel cell system can be realized, so that the cathode leakage detection efficiency of the fuel cell system can be improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a cathode leakage detection method and device for a fuel cell system. Background technique [0002] Fuel cell vehicles are a common type of new energy vehicles, which can convert the chemical energy of chemical fuels into electrical energy, and then store the electrical energy in the vehicle's battery for subsequent driving. Among them, the fuel cell system, as the power system of the fuel cell vehicle, is a very important part of the fuel cell vehicle. The more common fuel cell system at present is a system capable of reacting hydrogen and air to generate electricity, which usually includes a fuel cell stack, an air supply system (cathode side), a hydrogen supply system (anode side) and a cooling system. During the working process of the fuel cell system, the gas in the system is often compressed to a high pressure state to improve the power generation efficiency of the stack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0438H01M8/04992
CPCH01M8/0438H01M8/04395H01M8/04425H01M8/04992Y02E60/50
Inventor 曾夏周飞鲲李剑铮朱凤强何东轩
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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